Mold of typographical line casting machines



March 1934- H. w. MEACHIN ET)AL 1,952,815

MOLD OF TYPOGRAPHICAL LINE CASTING MACHINES Filed May 24, 1933 a Z. 5 a 5 10 g: 4 CF W m iydw ATTORNEYS Patented Mar. 27, 1934 UNEED STATES MOLD OF TYPOGRAPHICAL LINE CASTING MACHINES Horatio Walter Meachin, Altrincham, and Richard Henry Scott, Enfield, England, assignors to Linotype and Machinery Limited, London, England Application May 24, 1933, Serial No. 672,732 In Great Britain May 23, 1932 6 Claims.

This invention relates to typographical line casting machines such as those known commercially under the trade mark Linotype, wherein the slugs or type bars are cast from composed lines of matrices in a slotted mold, against one side of which the matrices are held during casting.

As these molds are usually constructed, the side Walls of the mold slot determining the body dimension of the slug are formed by a bottom or 10 body portion and an upper or cap portion, while the end walls, determining the length of the slug, are formed by two end portions or liners held in place between the body and cap portions. Both righthand and lefthand end liners are used in varying thicknesses for different body sizes of slugs, and one, usually the lefthand liner, is used in varying lengths for different lengths of slugs so that parallel sided slugs, or slugs having character bearing faces overhanging ribs 0n the body of the slug formed by core sections on the mold cap, may be conveniently cast of the desired dimensions.

In machines which are adapted to cast slugs having longitudinal grooves or ribs, or longitudinal grooves and ribs, formed in or on their side faces, which ribs or grooves are used for securing the slugs in the chases or holders of printing machines, it has been proposed to employ molds comprising movable sections which give to the sides of the slugs the desired contour, and are moved relatively to each other and to two fixed sections of the mold to permit the ejection of the slug therefrom. This construction of mold produces a slug of substantially T-shape, the type bearing portion having longitudinal ribs or grooves on its side, being cast between the movable sections of the mold and joined to the central web,

cast between the fixed sections of the mold, by a narrow neck so that it may be conveniently separated thereirom, as this central web is not required when applying the slug to the printing machine. As the cross-sectional contour of a mold so constituted prevents the employment of liners of the usual form for varying the length of the slug to be cast, such molds as heretofore constructed, have been adapted for casting slugs of only one given length, and moreover, the restricted portion of the mold by which the abovementioned narrow neck is formed has disadvantageously affected the flow of metal towards the character-bearing face of the slug, and has tended to impair the quality of the printing face.

According to the present invention the above mentioned disadvantages are avoided by provid- 55 ing a liner of a special form which can be used in varying lengths, and by casting the slug without the above mentioned narrow neck portion.

The invention is illustrated in the accompanying drawing in which:

Figure 1 is a perspective view of an improved liner;

Figures 2 and 3 are respectively a front elevation and a plan thereof;

Figure 4 is a front elevation of a mold with an improved liner fitted, and

Figure 5 is a section of the mold as viewed in the direction of the arrows on the line 5-5 of Figure 4, showing the adjacent part of the mold wheel, and the movable sections of the mold spread apart.

According to the constructional form of the invention illustrated in the drawing, the improved liner is adapted for application to a mold comprising a fixed cap section 1 and a fixed body section 2 rigidly secured to the mold wheel 3 and movable cap and body sections 4, 5, which latter can be spread apart as shown in Figure 5 to permit the ejection of the slug after casting. The mold is, or may be, substantially of the construction illustrated and described in application for Letters Patent Serial No. 560,305, filed on the 31st August 1931. As above stated, however, it is preferred when employing the improved liner, to dispense with the narrow neck portion of the slug produced by the mold according to the said application, and for that reason, in the present instance, the inner casting faces 4a, 5a, of the movable mold sections 4, 5, are rectangular as illustrated in Figure 5 instead of being tapered as in the construction according to the before-mentioned application.

Referring now to Figures 1, 2 and 3, the improved liner at its outer end portion 6 is formed as ordinarily, so that it can be fitted and held between the fixed sections 1, 2, of the mold cap and mold body, the usual rib '7 being provided for engagement with a groove in the mold body and the usual recess 8 to permit of the passage therethrough of the means by which the fixed portions of the mold body and mold cap are retained in 0 place. The said end portion 6 is actually of the same form as the liner which would be used for casting a slug of full length of the mold cavity.

The improved liner, however, is provided with an extension 9 which may be of any given length 105 appropriate to the length of the slug to be cast, and this extension is formed on its inner front edge where it extends into the portion of the mold constituted by the movable sections 4, 5, thereof with ribs 10 and grooves 11, adapted to iii) fit closely within the ribs and grooves of said movable sections when the latter are in their operative positions, so that the cross section of the liner for at least a portion of its length adjacent to its inner end is identical with the cross section of the slug to be cast.

By the use of these improved liners for the lefthand end of the mold as shown in Figure 4, in

' conjunction with liners such as 12 of the usual construction for the right-hand end of the mold, slugs of the special form before particularized may be conveniently cast of any desired length. Moreover, as it is preferred to dispense with the narrow neck portion of the slug, the improved liners may be of durable construction and the quality of the slug improved.

Having described our invention, we declare that what we claim and desire to secure by Letters Patent is:

1. In or for a typographical slug-casting mold having fixed body and cap sections and movable body and cap sections, the latter presenting longitudinally extending casting surfaces in planes difierent from those of the fixed sections, a liner adapted to be secured between the fixed sections of the mold and having surfaces in different planes extending between and adapted to be engaged by corresponding surfaces of the movable body and cap sections when the latter are in casting position.

2. In or for a typograpical slug-casting mold having fixed body and cap sections presenting longitudinally extending parallel casting surfaces and movable body and cap sections presenting longitudinally extending parallel casting surfaces in planes different from those of the fixed sections, a liner having longitudinally extending parallel surfaces adapted to fit between and to be engaged by the fixed sections of the mold and longitudinally extending parallel-surfaces in different planes extending between and adapted to be engaged by corresponding surfaces of the movable mold body and cap sections when the latter are in casting position.

3. In or for a typographical slug-casting mold having fixed body and cap sections with fiat casting surfaces and movable body and. cap sections with longitudinally ribbed casting surfaces, a liner having flat surfaces adapted to fit between and to be engaged by the fixed mold sections and longitudinally grooved surfaces adapted to fit between and to be engaged by the movable mold section.

4. In or for a typographical slug-casting mold having fixed body and cap sections with fiat casting surfaces and movable body and cap sections with longitudinally grooved casting surfaces, a liner having fiat surfaces adapted to fit between and to be engaged by the fixed mold sections and longitudinally ribbed surfaces adapted to fit between and to be engaged by the movable mold section.

5. In or for a typographical slug-casting mold having fixed body and cap sections with parallel fiat casting surfaces, and movable body and cap sections with longitudinally ribbed parallel casting surfaces, a liner having fiat parallel surfaces adapted to fit between and to be engaged by the fixed mold sections and longitudinally grooved parallel surfaces adapted to fit between and to be engaged by the movable mold sections.

6. In or for a typographical slug-casting mold having fixed body and cap sections with parallel fiat casting surfaces, and movable body and cap sections with longitudinally grooved parallel casting surfaces, a liner having fiat parallel surfaces adapted to fit between and to be engaged by the fixed mold sections and longitudinally ribbed parallel surfaces adapted to fit between and to be engaged by the movable mold sections.

HORATIO WALTER MEACHIN. RICHARD HENRY SCOTT. 

